setdemo.java

来自「java 教程相应的代码 全是自己写的内附注释 很容易看明白的」· Java 代码 · 共 27 行

package demo.chapter.collection;

import java.util.HashSet;
import java.util.Set;

public class SetDemo {

	@SuppressWarnings("unchecked")
	public static void main(String[] args) {
		Set set = new HashSet();
		
		set.add("one");
		set.add("second");
		set.add("3rd");
		set.add(new Integer(4));
		set.add(new Float(5.0F));
		set.add("second"); // duplicate, not added
		set.add(new Integer(4)); // duplicate, not added
		
		//System.out.println(set);
		for (Object obj : set) {
			System.out.println(obj);
		}
	}

}